Group 13 elements exhibit
Only + 3 oxidation state
Only + 1 oxidation state
Both + 1 and + 3 oxidation states
+1, +3 and -3 oxidation states
Rubles and sapphire are chemically
AI2O3
AI2O3 + Ag2O3
Ag2O + Au2O3
AI2O3 + C
Which of the following is not correct in case of boron nitride, BN?
It is a good insulator
It is hard because in one of the modifications it has diamond (zinc blende) like structure
It shows magnetc properties
It is chemically unreactive
Borazole is known as
Organic benzene
Organic compound
Inorganic compound
Inorganic benzene
Which of the following sublimes on heating?
AIF3
AICI3
AIBr3
AII3
The thermite process involves the use of
AI2O3 and Fe
AI2O3 and Fe2O3
AI and FeQ
AI and Fe2O3
Alumnium becomes passive in
Conc: HNO3
H2CrO4
HCIO4
All
Which of the following compounds are formed when BCI3 is treated with water?
H3BO3 + HCI
B2H6 + HCI
B2O3 + HCI
Anodized aluminium is aluminium
Obtained on anode
Electrolytically coated with aluminium oxide
Alloy of aluminium containing 95% of AI
All of the above
Alumina may be converted into anhydrous ALCL3 by
Heating it with conc.HCI
Heating it in a current of dry chlorine
Heating it with rock salt
Mixing it with carbon and heating the mixture in a current of dry chlorine.
